check_match
check_match(s, s->strstart, s->match_start, (int)s->match_length);
check_match(s, s->strstart - 1, s->prev_match, (int)s->prev_length);
check_match(s, s->strstart, s->strstart - 1, (int)s->match_length);
check_match(s, s->strstart, s->match_start, s->match_length);
check_match(s, s->strstart-1, s->prev_match, s->prev_length);
local void check_match(deflate_state *s, IPos start, IPos match,
if (matchline && !check_match(ifp->if_mib.ifdr_name))